How to make touchpad slide volume up/down smooth instead of one step at a time

I uninstalled AquaTouch because of a bug and since I only really use its 2, 3, 4 finger slide to volume, brightness and keyboard illumination up/down.

Now I'm trying to replicate it with the touchpad, using 2,3,4 finger slide left/right but it only increase/decrease one step per slide. How can I make it like a smooth scroll?